My DS8 has VERY similar scores to your DD's, though his high scores are in PRI, not VCI. He also got a 109 in Processing Speed and had a similar score for Working Memory.
For some kids, this lower PSI score indicates perfectionism. I don't believe that is the case in our DS's situation, though it sounds like perfectionism might be dragging down your DD's speed score. As with your DD, rote memorization isn't his strength either, though he can do it. For the most part, he's just an average kid when it comes to how fast he processes information.
These scores our kids have is actually not an uncommon mix of scores, based on what I've seen on this site. (Well, I mean obviously having scores THAT high is uncommon, but once you have a score that high, it's not uncommon to have a PSI or a WMI that is NOT that high...) A child can be gifted and not be fast. They're two separate things, which is why they're tested separately.
FWIW, DS8 shows no signs of a learning disability. DS8's WJ-III scores were consistent with his WISC scores, so we didn't worry too much about it. He just takes time to process things. It does function as a bottleneck for his learning, as Grinity has so aptly named it. But the "normal" part of him is how (not) fast he is. The unusual/rare part of him is how smart he is. He's basically a 13 or 14yo who operates at the speed of an 8yo. I would suggest not to make the speed thing out to be a problem in the absence of other evidence that it is a problem. DS's speed improves with time, just as it would for any other kid as he gets older. If it didn't, then I think that would also indicate a more serious issue beyond just being normal about speed.
The upshot of this score combination for us was that we felt grade-skipping wasn't a good choice for him. He would probably have a hard time keeping up with older kids, and in that specific situation his speed issues would have functioned as an LD. Homeschooling has been a better fit in his case, since it has allowed him to go as deep as he wants without having to rush, and it has allowed us to work on his processing speed as needed. (This is not a recommendation for you. I don't want to seem to be pushing our solution onto you or anyone else. It's just to make the point that speed matters when deciding how to approach the child's giftedness in the schools.)
If you suspect an LD for other reasons--the spelling and writing, for example--then I think that is something to pursue. Above-level achievement testing is very useful for this. If you find that your DD's achievement is significantly lower than her WISC scores, then you probably want to pursue the idea of an LD further.
I'd be happy to talk further if you want to. My DS isn't much older than your DD, but he was tested 3 years ago, so I've been thinking about it for a good bit longer.
